Protective Film Formation-Use Composite Sheet
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United States of America Patent
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Issued Date -
Jun 30, 2016
app pub date -
Jul 16, 2014
filing date -
Aug 1, 2013
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Abstract
A composite sheet (1) for forming a protective film which is provided with an adhesive sheet (2) formed by laminating an adhesive layer (22) on one surface of a base material (21), and a protective-film forming film (3) laminated on the adhesive layer (22) side of the adhesive sheet (2), wherein the adhesive sheet (2) does not have a through hole penetrating the adhesive sheet (2) in the thickness direction, and the light transmittance at a wavelength of 532 nm of the adhesive sheet (2), measured using an integrating sphere, is from 25 to 85%.
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